public int AddGems(int amount)
    {
        raceController.AddGems(amount);


        if (recentGems > gemMaxPitch)
        {
            recentGems = 0;
            CancelInvoke("ResetRecentGems");
        }
        else
        {
            recentGems++;
            CancelInvoke("ResetRecentGems");
            Invoke("ResetRecentGems", recentGemTime);
        }

        return(recentGems); //The recentGems determine the pitch of the gem collection sound.
    }